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    • 3. 发明申请
    • Method and Apparatus for Packet Loss Detection and Virtual Packet Generation at SVC Decoders
    • SVC解码器丢包检测和虚包分组生成方法及装置
    • US20090016447A1
    • 2009-01-15
    • US12224239
    • 2007-02-14
    • Ying ChenKai XiePurvin Bibhas Pandit
    • Ying ChenKai XiePurvin Bibhas Pandit
    • H04N7/64
    • H04N19/895H04N19/30H04N19/46H04N19/61H04N19/70H04N19/89
    • Packetized video data with a base-layer and at least one enhancement-layer organized in a GOP structure may contain packet loss errors. A method for detecting such errors comprises the steps of reading header information relating to a layer, generating a scheme or selecting a predefined scheme according to said header information, the scheme comprising display order number, number of reference frames and temporal level for the frames of the respective layer, extracting from received video data frames display order number, number of reference frames and temporal level parameters, and detecting that one or more frames or packets are missing, wherein the received parameters are compared with the parameters of expected frames according to said scheme and a missing packet or frame is determined by a mismatch between received and expected parameters.
    • 具有基层和以GOP结构组织的至少一个增强层的分组化视频数据可能包含分组丢失错误。 用于检测这种错误的方法包括以下步骤:根据所述标题信息来读取与层有关的标题信息,生成方案或选择预定义方案,所述方案包括显示顺序号,参考帧的数量和帧的时间级别 从接收到的视频数据帧中提取的各层显示订单号,参考帧数和时间级参数,并且检测到丢失了一个或多个帧或分组,其中接收的参数根据所述预期帧与参考帧的参数进行比较 方案和丢失的分组或帧由接收参数和预期参数之间的不匹配来确定。
    • 4. 发明授权
    • Method and apparatus for packet loss detection and virtual packet generation at SVC decoders
    • 用于在SVC解码器上进行分组丢失检测和虚拟分组生成的方法和装置
    • US08249170B2
    • 2012-08-21
    • US12224239
    • 2007-02-14
    • Ying ChenKai XiePurvin Bibhas Pandit
    • Ying ChenKai XiePurvin Bibhas Pandit
    • H04N7/64
    • H04N19/895H04N19/30H04N19/46H04N19/61H04N19/70H04N19/89
    • Packetized video data with a base-layer and at least one enhancement-layer organized in a GOP structure may contain packet loss errors. A method for detecting such errors includes the steps of reading header information relating to a layer, generating a scheme or selecting a predefined scheme according to the header information. The scheme can be made up of a display order number, and/or a number of reference frames and temporal level for the frames of the respective layer. The method can then extract from received video data frames the display order number, and/or the number of reference frames and temporal level parameters, and detect that one or more frames or packets are missing. The received parameters are compared with the parameters of expected frames according to the scheme and a missing packet or frame is determined by a mismatch between received and expected parameters.
    • 具有基层和以GOP结构组织的至少一个增强层的分组化视频数据可能包含分组丢失错误。 用于检测这种错误的方法包括以下步骤:根据标题信息读取与层相关的头信息,生成方案或选择预定方案。 该方案可以由显示顺序号和/或多个参考帧和各层的帧的时间水平组成。 然后,该方法可以从接收到的视频数据帧中提取显示顺序号和/或参考帧的数量和时间级参数,并且检测到一个或多个帧或分组丢失。 将接收的参数与根据该方案的预期帧的参数进行比较,并且丢失的分组或帧由接收的和预期的参数之间的不匹配来确定。
    • 6. 发明授权
    • Method and apparatus for encoding video pictures, and method and apparatus for decoding video pictures
    • 用于编码视频图像的方法和装置,以及用于解码视频图像的方法和装置
    • US07847861B2
    • 2010-12-07
    • US11392427
    • 2006-03-29
    • Jiefu ZhaiYing Chen
    • Jiefu ZhaiYing Chen
    • H04N7/12
    • H04N19/33H04N19/11H04N19/157H04N19/176H04N19/196H04N19/46H04N19/463H04N19/593H04N19/70
    • The H.264 standard has introduced a new coding method for intra-coded pictures, which is named “intra prediction”. The basic idea of intra prediction is to predict a block using reconstructed neighbour pixels. Thus, only the residual information needs to be encoded. Scalable video coding adds some scalable extension to H.264, in terms of spatial, temporal and SNR scalability. An improved encoding method for scalable video comprises generating from a video picture a first and a second picture with higher resolution than the first picture, wherein each macroblock in the first picture has a plurality of corresponding macroblocks in the second picture, intra-coding the first picture on macroblock level, wherein for each macroblock a prediction direction is determined, generating a first residual picture, intra-coding the second picture on macroblock level, wherein for each macroblock the prediction direction of the corresponding macroblock of the first picture is reused, and generating a second residual picture.
    • H.264标准为帧内编码图像引入了一种新的编码方式,被称为“帧内预测”。 帧内预测的基本思想是使用重建的邻居像素预测块。 因此,只需要对残差信息进行编码。 在空间,时间和SNR可扩展性方面,可扩展视频编码为H.264增加了一些可扩展的扩展。 一种用于可缩放视频的改进的编码方法包括:从视频图像生成具有比第一图像更高分辨率的第一和第二图像,其中第一图像中的每个宏块在第二图像中具有多个对应的宏块,对第一图像进行内编码 对于每个宏块,对于每个宏块,确定预测方向,生成第一残差图像,对宏块水平进行第二图像的编码,其中对于每个宏块,第一图像的对应宏块的预测方向被重新使用,以及 产生第二残留图像。
    • 7. 发明申请
    • Method and apparatus for encoding video data, and method and apparatus for decoding video data
    • 用于编码视频数据的方法和装置,以及用于解码视频数据的方法和装置
    • US20090041121A1
    • 2009-02-12
    • US11920819
    • 2006-05-03
    • Ying ChenJiefu ZhaiKui GaoKai Xie
    • Ying ChenJiefu ZhaiKui GaoKai Xie
    • H04B1/66
    • H04N19/615H04N19/103H04N19/105H04N19/13H04N19/159H04N19/172H04N19/33H04N19/59H04N19/61H04N19/63
    • Scalable video coding based on H.264/AVC uses motion compensation, which results in motion vectors and residual pictures. To optimize the encoding of the residual pictures of the enhancement-layer, they can be predicted from the base-layer. This requires complex encoders and decoders. Simplified residual prediction techniques are provided that focus on reducing the encoding and decoding complexity of the spatial scalable enhancement-layer with optimized coding efficiency. The method for encoding video data containing high-pass frames and low-pass frames comprises the steps of encoding the low-pass frames, wherein residual prediction may be used, splitting the high-pass frames into two interleaving frame groups, encoding the frames of the first of said frame groups, wherein residual prediction may be used, and encoding the frames of the second of the frame groups using an encoding method without residual prediction.
    • 基于H.264 / AVC的可扩展视频编码使用运动补偿,其导致运动矢量和残留图像。 为了优化增强层的残留图像的编码,可以从基层预测它们。 这需要复杂的编码器和解码器。 提供了简化的残差预测技术,其重点是以优化的编码效率降低空间可缩放增强层的编码和解码复杂度。 用于编码包含高通帧和低通帧的视频数据的方法包括对低通帧进行编码的步骤,其中可以使用残差预测,将高通帧分为两个交织帧组,对 所述帧组中的第一个,其中可以使用残差预测,并且使用没有残差预测的编码方法对所述第二帧组中的帧进行编码。
    • 8. 发明申请
    • Method and apparatus for encoding video pictures, and method and apparatus for decoding video pictures
    • 用于编码视频图像的方法和装置,以及用于解码视频图像的方法和装置
    • US20060262216A1
    • 2006-11-23
    • US11392427
    • 2006-03-29
    • Jiefu ZhaiYing Chen
    • Jiefu ZhaiYing Chen
    • H04N11/04
    • H04N19/33H04N19/11H04N19/157H04N19/176H04N19/196H04N19/46H04N19/463H04N19/593H04N19/70
    • The H.264 standard has introduced a new coding method for intra-coded pictures, which is named “intra prediction”. The basic idea of intra prediction is to predict a block using reconstructed neighbour pixels. Thus, only the residual information needs to be encoded. Scalable video coding adds some scalable extension to H.264, in terms of spatial, temporal and SNR scalability. An improved encoding method for scalable video comprises generating from a video picture a first and a second picture with higher resolution than the first picture, wherein each macroblock in the first picture has a plurality of corresponding macroblocks in the second picture, intra-coding the first picture on macroblock level, wherein for each macroblock a prediction direction is determined, generating a first residual picture, intra-coding the second picture on macroblock level, wherein for each macroblock the prediction direction of the corresponding macroblock of the first picture is reused, and generating a second residual picture.
    • H.264标准为帧内编码图像引入了一种新的编码方式,被称为“帧内预测”。 帧内预测的基本思想是使用重建的邻居像素预测块。 因此,只需要对残差信息进行编码。 在空间,时间和SNR可扩展性方面,可扩展视频编码为H.264增加了一些可扩展的扩展。 一种用于可缩放视频的改进的编码方法包括:从视频图像生成具有比第一图像更高分辨率的第一和第二图像,其中第一图像中的每个宏块在第二图像中具有多个对应的宏块,对第一图像进行内编码 对于每个宏块,对于每个宏块,确定预测方向,生成第一残差图像,对宏块水平进行第二图像的帧内编码,其中对于每个宏块,重新使用第一图像的对应宏块的预测方向,以及 产生第二残留图像。
    • 9. 发明申请
    • Method and apparatus for generating a quantisation matrix that can be used for encoding an image or a picture sequence
    • 用于生成可用于编码图像或图像序列的量化矩阵的方法和装置
    • US20060133479A1
    • 2006-06-22
    • US11293610
    • 2005-12-02
    • Ying ChenJiefu Zhai
    • Ying ChenJiefu Zhai
    • H04N11/04H04N11/02H04N7/12H04B1/66
    • H04N19/192H04N19/126H04N19/134H04N19/154H04N19/172H04N19/174H04N19/177H04N19/60H04N19/61
    • A significant data rate reduction effect in video coding is acchieved by quantizing the transformed frequency coefficients or components of a pixel block so that thereafter fewer amplitude levels need to be encoded and part of the quantised amplitude values becomes zero and need not be encoded as quantised amplitude values. Many transform based video coding standards use a default quantization matrix to achieve better subjective video coding/de-coding quality. A quantization matrix assigns smaller scaling values to some frequency components of the block if the related horizontal and/or vertical frequencies are believed to be the less important frequency components with respect to the resulting subjective picture quality. The inventive quantization matrix generation starts from default quantization matrices and derives therefrom a perceptually optimum quantization matrix for a given picture sequence. In a first pass the candidate quantization matrix for a given picture sequence is iteratively constructed by simultaneously increasing scaling values for some coefficient positions and decreasing scaling values for other ones of the coefficient positions. In a second pass the generated quantization matrix is applied for re-encoding the picture sequence.
    • 通过量化像素块的变换的频率系数或分量来获得视频编码中的显着的数据速率降低效果,以便此后需要编码更少的幅度水平,并且部分量化振幅值变为零并且不需要被编码为量化幅度 价值观。 许多基于变换的视频编码标准使用默认量化矩阵来实现更好的主观视频编码/解码质量。 如果相关的水平和/或垂直频率相对于所得到的主观图像质量不太重要的频率分量,则量化矩阵将更小的缩放值分配给块的某些频率分量。 本发明的量化矩阵生成从默认量化矩阵开始,并从其导出用于给定图像序列的感知最佳量化矩阵。 在第一遍中,给定图像序列的候选量化矩阵通过同时增加一些系数位置的缩放值并减小其他系数位置的缩放值来迭代地构造。 在第二遍中,生成的量化矩阵被应用于重新编码图像序列。